济南岩溶含水介质孔隙结构特征

武东强; 邢立亭; 兰晓荀; 孟庆晗; 侯玉松; 赵振华; 孙斌; 袁学圣

济南岩溶含水介质孔隙结构特征

1.
济南大学水利与环境学院
2.
济南大学水利与环境学院/山东省地矿工程勘察院
3.
山东省地矿工程勘察院

基金项目: 国家自然科学基金项目（41772257,42002257）；山东省高校院所创新团队项目（2018GXRC012）；山东省自然科学基金（ZR2020QD123）

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出版历程
- 发布日期: 2021-08-25

Pore structure characteristics of karst water-bearing media in Jinan

1.
School of Water Resources and Environment， University of Jinan
2.
School of Water Resources and Environment， University of Jinan/Shandong Geological and Mineral Engineering Investigation Institute
3.
Shandong Geological and Mineral Engineering Investigation Institute

摘要

摘要: 以济南泉域为例，基于2004-2019年济南岩溶泉域大气降水资料、地下水水位动态监测资料和岩芯的压汞实验结果，采用分形理论中孔隙分形维数法和数理统计的方法，探究含水岩层孔隙结构对泉水位动态的影响。结果表明：（1）炒米店组和三山子组2号样的孔隙发育均匀，孔喉分布集中，岩层储水性能好、储水空间较大；马家沟组北庵庄段的孔隙发育均匀，孔喉分布集中，岩层储水性能差，储水空间小；三山子组1号样和马家沟组东黄山段的孔隙发育不均匀，孔喉分布分散，岩石内部储水空间大；（2）岩层渗透率主要受孔喉分布的影响，济南泉域碳酸盐岩含水层的孔隙储水空间大、储水性能好，济南泉域独特的孔隙结构在维持趵突泉水位动态稳定中起到重要作用。
- 岩溶含水层 /
- 孔隙结构特征 /
- 分形维数 /
- 泉水水位
Abstract: Jinan is a typical karst area in north China， with abundant karst water resources. The void structure of carbonate aquifers is the main seepage channel and storage space for karst water. The groundwater flowing in the pores continuously dissolves the carbonate rock， which intensifies the heterogeneity and complexity of the karst water-bearing medium. Through scholars’ research on the pore structure of carbonate rocks in north China，it is found that only by grasping of the pore structure characteristics of the karst water-bearing medium as well as understanding the movement laws of the karst water in the north China，can we provide a scientific basis for the sustainable utilization of karst groundwater. Taking Jinan spring area as an example， based on the atmospheric precipitation data groundwater level dynamic monitoring data and mercury intrusion porpsimetry test results of core in Jinan spring area from 2004 to 2019， the method of pore fractal dimension in fractal theory and mathematical statistics is used to explore the influence of pore structure of water-bearing rock formation on spring water level dynamics. The results show that，（1） The pores of the No.2 samples of the Chaomidian formation and Sanshanzi formation are well developed， the pore throats are concentrated， the rock formation has good water storage performance and large water storage space. The pores of the Bei’anzhuang section of the Majiagou formation are well-developed， with concentrated pore throats distribution，poor water storage performance and small water storage space. The No. 1 sample of the Sanshanzi formation and the Donghuangshan section of the Majiagou formation have uneven pore development， with scattered pore throat distribution， and large water storage space inside the rock；（2） The permeability of water-bearing stratum is affected by the distribution of pores and throats， pore surface roughness， pore heterogeneity， and the path and pore capillary bundles required for water flow seepage，of which the permeability of rock formation is mainly affected by the distribution of pores and throats；（3） There is a positive correlation between fractal dimension and groundwater dynamics.The fractal dimension of Chaomidian formation in the drainage area is smaller than that of Bei’anzhuang section. The annual variation of the groundwater level of the Chaomidian formation in the drainage area is smaller than that of the Bei’anzhuang section. The carbonate aquifer in Jinan spring area has large pore water storage space and good water storage performance. The unique pore structure of Jinan spring area plays an important role in maintaining the dynamic stability of Baotu spring water level.
- karst aquifer /
- pore structure characteristics /
- fractal dimension /
- spring water level

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